Dam per-regulator



(No Model.)

0.0.KBSTY- DAMPBR REGULATOR.

UNITED STATES i PATENT OFFICE.

CHARLES CLOTVVVORTHY'KESTY; OF NORTHUMBERLAND, PENNSYLVANIA.

DAM PER-REGULATOR.

SPECIFICATION forming part of Lettere Patent Ne.`591,554, dated october12, 1897.

Application filed January 7, l89'7.

To @ZZ wiz/0m` t misgaan/cern.:

ABe it known that I, CHARLES CLOTWORTHY KEsTY, a citizen of the UnitedStates of America, residing at Northumberland, in the county ofNorthumberlandjin: the AState of Pennsylvania, have invented a new anduseful Damper-Regulator, of 'which lthe 'following is a specification.

My invention relates to improvements in damper-regulators of that classand construction denominated Huid-pressure, wherein the damper isautomatically operated to regulate the draft in a boiler-furnace by theaction or pressure of steam in the boiler; and the object is to providean improved device or apparatus of the kind named and for the purposementioned which is simple and durable in construction and certain andefficient in operation.

I accomplish the objects of the invention by the means illustrated inthe accompanyvingdrawings, wherein- Figure 1 is a View in elevation ofthe complete apparatus, showing it as in operative connection to aboiler and damper. Fig. 2 is a vertical central sectional View throughthe pressurecylinder, showing the piston arranged therein with thepiston-head or valve. Fig. 3 is a transverse section through thesteam-pipe frame and piston-cylinder, taken on the line 3 3 of Fig. 1.Fig. 4 is a detail side view of the rocking arm and grooved segment forcarrying the chains or cables and operating the damper. Fig. 5 is adetail View of the cylinder, showing the drip-pipe.

Referring to the drawings, A designates a boiler, which may be of any ofthe-approved makes and construction now in common use for the purpose ofheating water, and provided with lire-boxes and combustion vchanubers,(not here shown,) and B designates the furnace iiue, pipe, or stackwherein the regulating-damper 1 is mounted. This damper 1 consists of ametal disk fitted to the stack and mounted to turn with and secured to asuitable journal 2, diametrically disposed in bearings formed in theshell of the stack or pipe.

C designates a rectangular frame of suitable metal pipes andconstituting the frame vof the device. This frame O is composed of catedinthe drawings.

metal tubes or steam-pipes 4 4', of requisite Serial No. 618,234. (Nomodel.)

dimensions and capacity, arranged parallel with each other, to therespective ends ofI which are suitably secured tubular crossh`eads 5 5',communicatingwith the pipes 4 4', substantially as shown in thedrawings. In the upper cross-head 5 is let a steam-pipe a,

having its other end opening into the boiler.

. ment by asuitable cross-piece 7, embracing the upper end 0f thecylinder and having its ends preferably surrounding the steam-'pipes 44', as shown. A small drip or escape pipe 8 has one end opening into theupper end of the cylinder andpleads down a desired distance-to dischargeand carry o any water which may iind its Way into the cylinder above thepiston-head vduring the operation of the device. This drip-pipe ispreferably located behind the cylinder when, the frame is mounted inposition, as indicated in Fig. 5 of the drawings. In the lowercross-head 5 is inserted a short pipe 8', provided with a valve orturning-plug 9 for use in relieving the pipes of any surplus water thatmay accumulate in them.

The pipe-frame of the apparatus may be suitably secured to a supportingplate 'or board 10 by means of brackets 11 11', formed on or secured tothe respective cross-heads of the pipe-frame, and the whole frame thusmade portable and conveniently mounted for being secured to a verticalsurface, as indi- E designates the piston-rod, working in the cylinder Dand having rigidly,`but detachably, secured to its upper end ,across-rod 12, the ends of which slidingly engage the parallel verticalvmembers of the frame which serve as guides to direct the piston-rod inits movements. The stroke of the piston is limited and regulated bymeans of sleeves or collars 13 13' on the side pipes, the collars beingfixed in the desired alined position by means of set-screws 14 14. Onthe piston-rod isadjustably secured a collar 15, which supports one ormore weights 1G to substantially balance the high pressure from theboiler and to carry the piston down when the pressure-is reduced. Theupper end of the piston- IOO rod projects above the guiding cross-bar12, l vice or apparatus which opens and closes the and is formed with aneye, to which is attached one end of the damper-chain 17, which iscarried over a suitably-mounted grooved wheel 1S, and from thence over asectorsheave 19, and has its outer end secured to the outer end of thesector-sheave 19, as shown in the drawings. A hook r is secured totheframe at any proper point, so that when it is desired to have the damperremain stationary the chain is disconnected from the piston andconnected to the hook. This is desirable when the boiler is not in useat night or it is desirable to carry a very low fire. The sectorsheave19 consists of a sector-rim formed with two parallel grooves 20 20' inits face and a supporting-standard 21, suitably secured t0 theprojecting end of the damper-journal, substantially as shown in thedrawings.

To the inner end of the sector-rim, being the end opposite to that towhich the chain 17 is secured, is fastened the end of a chain 22, whichrests in the groove 20' of the sector, the said chain being arrangedwith its free end depending beyond the sector, and has a weight 23 hungthereto to draw the piston upward and turn the damper in the oppositedirection to the movement effected by the downward movement of thepiston through the action of the chain 17.

The lower end of the piston-rod is made of reduced diameter and isextended a sufficient distance to take on and carry the piston-head.This piston-head is composed of an upper disk 21, dished out orconcaved, as at 24, in which is seated a suitable washer or packingring25, the edge of which bears closely against the inner surface of thecylinder in the usual manner; a second element or disk 2G, formed with aconvex upper surface fitting the concave of the upper disk and pushingand holding the washer 25 in place and having its lower end or faceconcaved to receive the second packing-ring 27; a washer 2S, formed witha convex upper surface to hold the packing-ring 27 in place, and aclamping-nut 29 on the threaded end of the extension of the piston-rod.

The piston-head is preferably made but on e-sixteenth of an inch less indiameter than the cylindeigso that the packing-rings project onethirty-second of an inch. The middle section of the piston-head servesas a washer and clamp to hold the upper packingring in position, and itwill readily be perceived that the upper disk 24 of the pistonhead maybe formed integral with the stein or piston-rod.

It will be perceived from the foregoing description, taken in connectionwith the drawings, that I have provided a practical and reliableautomatically operating damper dedamper by the variable action of thesteampressure from the boiler.

The operation may be stated as follows: The regulator is placed inproper position and the requisite connections made with the boiler anddamper. The cylinder is then illed about half full of cold water and thepiston inserted in the cylinder. The steam is then raised to the desiredpressure and the damper closed. The chain 17 leading to the piston isnow connected therewith with the piston raised to its upper limit ofmovement, and the piston-rod is now weighted until it slightly moves toopen the damper. Now when the steam falls the pressure in the cylindercorrespondingly decreases and the piston gradually descends, opening thedamper through its connection thereto by the chain, thus increasing thedraft in the furnace, the increased heat thus engendered eventuating inraising the steampressure again to the desired point, when thesteam-pressure in the frame-pipes effects the movement of the pistonupward and the weight on the sector moves the damper to close the draft,and thus gradually close the draft again.

Having thus described the invention, what I claim, and desire to secureby Letters Patent, is-

1. The combination with a boiler and a furnace, of a fluid-pressuredamper-regulator, comprising an angular steam-pipe frame, a pipeconnection therefrom to the boiler, a pressure-cylinder secured to andopenin g into the lower end of the steam-pipe frame, a piston in thecylinder, a guide cross-bar on the upper end of the piston having itsends slidingly engaging the side pieces of the frame, a damper journaledin the furnacefine, a grooved pulley, a chain over the said pulley andoperatively connected to the piston and the damper and acounterbalance-weight on the damper.

2. In a fluid-pressure damper-regulator, the steam-pipe frame hereindescribed, comprising parallel steam side pipes, tubular crossheadsconnecting said side pipes at top and bottom, a piston-cylinderextending vertically from the lower cross-head, a piston in the verticalcylinder, a guide cross-rod on the upper end of the piston having itsends slid-A ingly engaging the parallel side pipes, and a steam-pipesecured to the upper cross-head.

In witness whereof I have hereto set my hand in the presence of twoattesting witnesses.

CHARLES CLOTWORIIIY KES'IY.

Attest:

PIERCY LITTLE, J. SIMPSON KLINE.

IOO

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